My blasted enterprise did something similar earlier this year, it's probably unrelated, but it was due to the failure of a cooling fan within the power supply, which led to overheating after a short run and subsequent shutdown (length of run inversely proportional to output power). The troubleshooting guide didn't cover this, and the warning indicators suggested a totally different fault. Does your power supply have a cooling fan? If so does it operate correctly, or is there a blocked air filter? Is there a build up of dust internally? Hope this helps, Ray
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